Navigation Links
Pitt researchers create non-toxic clean-up method for potentially toxic nano materials
Date:12/16/2008

PITTSBURGHUniversity of Pittsburgh researchers have developed the first natural, nontoxic method for biodegrading carbon nanotubes, a finding that could help diminish the environmental and health concerns that mar the otherwise bright prospects of the super-strong materials commonly used in products, from electronics to plastics.

A Pitt research team has found that carbon nanotubes deteriorate when exposed to the natural enzyme horseradish peroxidase (HRP), according to a report published recently in Nano Letters coauthored by Alexander Star, an assistant professor of chemistry in Pitt's School of Arts and Sciences, and Valerian Kagan, a professor and vice chair of the Department of Environmental and Occupational Health in Pitt's Graduate School of Public Health. These results open the door to further development of safe and natural methodswith HRP or other enzymesof cleaning up carbon nanotube spills in the environment and the industrial or laboratory setting.

Carbon nanotubes are one-atom thick rolls of graphite 100,000 times smaller than a human hair yet stronger than steel and excellent conductors of electricity and heat. They reinforce plastics, ceramics, or concrete; conduct electricity in electronics or energy-conversion devices; and are sensitive chemical sensors, Star said. (Star created an early-detection device for asthma attacks wherein carbon nanotubes detect minute amounts of nitric oxide preceding an attack.)

"The many applications of nanotubes have resulted in greater production of them, but their toxicity remains controversial," Star said. "Accidental spills of nanotubes are inevitable during their production, and the massive use of nanotube-based materials could lead to increased environmental pollution. We have demonstrated a nontoxic approach to successfully degrade carbon nanotubes in environmentally relevant conditions."

The team's work focused on nanotubes in their raw form as a fine, graphite-like powder, Kagan explained. In this form, nanotubes have caused severe lung inflammation in lab tests. Although small, nanotubes contain thousands of atoms on their surface that could react with the human body in unknown ways, Kagan said. Both he and Star are associated with a three-year-old Pitt initiative to investigate nanotoxicology.

"Nanomaterials aren't completely understood. Industries use nanotubes because they're uniquethey are strong, they can be used as semiconductors. But do these features present unknown health risks? The field of nanotoxicology is developing to find out," Kagan said. "Studies have shown that they can be dangerous. We wanted to develop a method for safely neutralizing these very small materials should they contaminate the natural or working environment."

To break down the nanotubes, the team exposed them to a solution of HRP and a low concentration of hydrogen peroxide at 4 degrees Celcius (39 degrees Fahrenheit) for 12 weeks. Once fully developed, this method could be administered as easily as chemical clean-ups in today's labs, Kagan and Star said.


'/>"/>

Contact: Morgan Kelly
mekelly@pitt.edu
412-624-4356
University of Pittsburgh
Source:Eurekalert

Related biology news :

1. Researchers identify new anti-tumor gene
2. UAF researchers to present at AGU press briefing
3. Researchers create new class of fluorescent dyes to detect reactive oxygen species in vivo
4. GUMC researchers find gene function lost in melanoma and glioblastoma
5. Pitt, NETL researchers report molecular chain reaction thought to be impossible
6. MIT researchers explain mystery of gravity fingers
7. UC San Diego researchers use metagene portraits to reveal distinct stages of kidney formation
8. CSHL researchers map changing epigenetic modifications that enable transposons to run amok
9. UNH researchers track lobster migrations to improve population estimates
10. Siblings of mentally disabled face own lifelong challenges, according to researchers
11. Caltech researchers get first look at how groups of cells coordinate their movements
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:5/16/2017)... TEANECK, N.J. , May 16, 2017  Veratad ... leading provider of online age and identity verification solutions, ... the K(NO)W Identity Conference 2017, May 15 thru May ... Ronald Regan Building and International Trade Center. ... across the globe and in today,s quickly evolving digital ...
(Date:4/18/2017)... Inc., a global expert in SoC-based imaging and computing solutions, has ... features the company,s hybrid codec technology. A demonstration utilizing TeraFaces ® ... be showcased during the upcoming Medtec Japan at Tokyo Big Sight ... Las Vegas Convention Center April 24-27. ... Click here for an image of the ...
(Date:4/11/2017)... DUBLIN , Apr. 11, 2017 Research ... Tracking Market 2017-2021" report to their offering. ... The global eye tracking market to grow at ... The report, Global Eye Tracking Market 2017-2021, has been prepared based ... report covers the market landscape and its growth prospects over the ...
Breaking Biology News(10 mins):
(Date:10/10/2017)... ... October 10, 2017 , ... ... targeted antibody-drug conjugate (ADC) therapeutics, today confirmed licensing rights that give it ... Nanoparticle), a technology developed in collaboration with Children’s Hospital Los Angeles (CHLA). ...
(Date:10/10/2017)... ... October 10, 2017 , ... ... process optimization firm for the life sciences and healthcare industries, announces a presentation ... San Francisco. , The presentation, “Automating GxP Validation for Agile Cloud Platforms,” will ...
(Date:10/9/2017)... ... October 09, 2017 , ... The Giving Tree ... products targeting the needs of consumers who are incorporating medical marijuana into their ... Phoenix, Arizona. , As operators of two successful Valley dispensaries, The Giving Tree’s ...
(Date:10/6/2017)... ... October 06, 2017 , ... The HealthTech Venture ... sector at their fourth annual Conference where founders, investors, innovative practitioners and collaborators ... ELEVATE pitch competition showcasing early stage digital health and med tech companies. , ...
Breaking Biology Technology: